Method of producing metal sheets.



Patented July 8*,- 1902.

T. V. ALLIS.

METHOD OF PRODUCING METAL SHEETS.

(Application filed July 15 1901.)

(No Model.)

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known that in sizes of tin-plate and sheets STATES PATENT OFFicET.

THOMAS V. ALLIS, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE INTERNATIONAL TIN PLATE CORPORATION, A

CORPORATION OF NEWV JERSEY.

METHOD OF PRODUCING METAL SHEETS.

SPECIFICATION forming part of Letters Patent No. 704,287, dated July 8, 1902.

Application filed July 18, 1901. Serial No. 68,762. (N Specimens.)

T0 wZZ whont it may concern:

Be it known that LTHoMAs V. ALLIS, a citizen of the United States, and a resident of Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Methods of Producing Metal Sheets, of which the following is a specification.

My invention is an improved method of producing metal sheets the length and thickness of which are determined entirely from the width of material of an established thickness from which they are rolled and not from varying thicknesses, as heretofore practiced. What in rolling-mill parlance is called tinplate bars or sheet-bars are brought into this condition when the metal is steel directly from the ingot in one or two heats. These bars are of a uniform width and of different thicknesses, varying in ounces per foot in weight, and are kept in stock to be afterward rolled down into sheets or black plate, from which tin-plate is largely made, and it is the thickness of these bars that determines the length and thickness of the finished product, which is generally rolled in packs. The width of the sheets is decided by the length of sections cut from said bars. It is well there are a multiplicity of variations. It naturally follows that the tin-plate or sheet bars must also vary in order that the length and thickness of the finished packs may be accurately determined and cut into the required sizes with minimum waste. The thickness of these primary bars varies so slightly that to meet all requirements a large quantity of said bars are constantly carried in stock. Also the care necessary in separating these bars and keeping those of the same thickness together entails an additional expense on the manufacturer besides the liability to error and confusion. By my improved method the length and thickness of the finished sheets are not determined by the thickness of the initial plates, which are always fixed, but are determined entirely by the widths of such initial plates, whether such plates are the direct product of ingots or the product of billets or slabs rolled from ingots.

It will therefore be seen that these initial plates from which the finished packs are formed when varying in width rather than thickness affords a better opportunity to select the proper plates for the work in hand, as a slight variation in width can be more readily detected by the eye than a slight variation in thickness.

To enable others to understand my invention, reference is had to the accompanying drawings, in which Figure 1 represents a perspective view of an initial plate rolled down from the ingot. Fig. 2 is a perspective view of a section cut from such initial plate and adapted to be rolled crosswise of the previous rolling into succeeding or secondary plate. Fig. 3 is a view in perspective of a plate produced from the initial section shown at Fig. 2. Fig. 4 is a view in perspective of a pack composed of individual plates cut from the secondary plate shown at Fig. 3 and adapted to be rolled crosswise. Fig. 5 is a perspective view of a finished pack rolled down from the pack shown at Fig. 4.

The construction and operation are as follows:

1 represents an initial plate of established thickness rolled from an ingot, which in practice may be of difierent widths. From such plates I cut and roll the section 2, the width of which taken in the direction it was rolled practically represents the width of the plate 3. The length and thickness of plate 3 are determined by the width of plate 1, and such length is produced by rolling the section 2 transversely, as indicated by arrow a. Seetions are then cut transversely from plate 3 in lengthsrequired for the width of the finished product, and these sections are piled into packs, fastened together and heated, and then rolled crosswise of the previous direction of rolling to the length desired in the finished product, the length of the previouslycut section being by this method preserved as the desired width in the finished product. The product of this last rolling is represented by the finished pack of sheets, as shown at Fig. 5.

It will be understood that in my niethod the plates from which all succeeding rollings are made must be of established thickness, but of different widths, and when out to desired lengths produce all the varied sizes of finished sheets and whereby much of the annoyance and expense incidental to the old method of rolling black plate and sheets are overcome.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The herein-described improvement in the art of manufacturing metal sheets, which consists in rolling a plurality of initial plates of an established uniform thickness and of predetermined different widths, cutting sections transversely therefrom of a length required in the width of the next succeeding or secondary plates, and cross-rolling said sections into succeeding or secondary plates of uniform thickness, the Width and thickness of the initial plates determining the length and thickness of said secondary plates, as set forth.

2. The herein-described improvement in the art of manufacturing metal sheets in packs of predetermined varying sizes, Which consists in rolling initial plates of an established uniform thickness and of predetermined different Widths, cutting sections transversely from said initial plates of a length required in the Width of the secondary or next succeeding plates, and cross-rolling said sections into the next succeeding or secondary plates of a uniform thickness, cutting these secondary plates transversely into sections and to lengths of the reqnired Width of packs, prior to reduction, piling said sections into packs, heating the packs, and reducing the same by cross-rolling, as set forth.

Signed at Bridgeport, in the county of Fairfield and State of Connecticut, this 17th day of July, A. D. 1901.

THOMAS V. ALLIS.

WVitnesses:

S. J. CHAFFEE, JOHN B. CLAPP. 

